Muffler.



N. RAPP.

MUFFLBR.

APPLICATION FILED 001228, 1912.

1,071,528, Panted Aug. 26, 1913.

INVENT El E\ ITNE Y UNITED STATES PATENT OFFICE.

NATHANIEL mir?, OE TOLEDO, OHIO, AssIGNoE TO THE COMMERCE TRUST COMPANY,

CE TOLEDO, OHIO.

MUFFLER.

Specication o! Letters Yatent.

Application led October 28, 1912. Serial No. 728,020.

To all 'whom t may concern.'

Be it known that I, NA'i'irANiEL ItArr, a citizen of the United States, residing at Toledo, Lucas county, Ohio, have invented new and useful Mufflers, of which the following is a specification.

This invention relates to a mechanism for receiving a discharge of fiuid and dispersing said discharge in a quiet manner.

This invention has utility when cmbodied as a muffler, especially for mounting to take care of the exhaust of internal combustion engines, wherein it possesses great efficiency in minimizing any back pressure.

Referring to the drawings: Figure 1 is a side elevation, with a portion thereof in me dial section, of an embodiment of the invention as adapted for use in connection with internal combustion engines; Fig. 2 is a view thereof in side elevation with the Outeihousing removed; Fig. 3 is a view thereof in side elevation with the inner housing ,also removed; and Fig. 4 is an end View thereof with the cap removed and the lower portion on the line IV of Fig. 1 looking in the direction of the arrow.

Mounted on the diaphragm 1 by the bolts 2 is the flaring core member 3 forming an enlargement or receptacle. This core member 3 tapers to the sleeve section 4 internally threaded to engage the nipple 5 which protrudes therefrom to provide a mounting for the internally threaded throat section of the core member 6 which on its opposite end, beyond the enlargement or receptacle portion thereof tapers to a second sleeve' section 4 similar to the sleeve section. 4 of the first core member 3. Thissccond sleeve member 4 is connected by the externally threaded nipple 5 (Fig. 3) to a second core member- 6, also forming an enlargement or receptacle. The number of these enlargements may be varied as found desirable in practice. However, with the three enlargements or receptacles as shown, most desirable results have been obtained when mounted to care for the exhaust of a four cylinder gasolene' engine rated at from thirty to forty horsepower.

Y Mounted on the core members is an inner housing. Over the core member 3 is disposed the housing sect-ion or shell 7 having a flange 8 abutting the diaphragm 1. This flanged section 7 has a central opening slidable along the sleeve 4, and the flange 8 is normally held seated against the diaphragml 1 by three bolts 9 having nuts 10 adjustable to vary the compression of the coil springs 11. Accordingly there may be very delicate adjustment of the pressure at which the shell 7 will move away from the diaphragm 1 to further compress the-springs 11 and thus produce a distributed endless discharge opening about the flange 8, which will readily and automatically reseat upon relieving the. pressure.

As the diaphragm 1 is fixed andthe abutting section 7 isrelatively movable, so about the adjacent core member 6 is the housing or shell section 12 fixed relatively to the core by being engaged between the member 6 and the end of the sleeve section 4 of the member 3. Abutting the iix'ed flange 13 of this fixed inner housing section 12 about the enlargement 6 is the opposing inner housing section 7 with its iange 8. The inner housing sections are built up to correspond with the enlargements of the core members.

In order that the movable housing sections 7 may yield 4 as normally held seated by three spring actuated bolts. While the first section 7 is held by the three bolts 9,'the second section is held by the bolts 14 and the third section.

this spring liousingportion of the device from the gas receiving end, so that there may be no heat to effect the action of the springs 11 on the several bolts 9, 14, 15. This housing section 18 has a bead 20 thereon serving as a seat for the cap or end closure 21 held in position by the bolt 22 engaging the member 23 to connect with the spider 24 which is abutted by the springs 11 and thus serves to keep the cap 21 seated.

Fitting over the flange 16 is the outer housing 25 abutting the housing section 18. This housing 25 has openings 26 therein of sufficient aggregate area to be in excess of some of the lareas of the Openings produced uniformly, each is shown' v7 12. 7is such that in practice there is'but a quiet' -by the movement of the flanges 8 away from their opposing seats in normal operation. The housing 25 has the bead 27 forming a seat for the cap 28 heldin position by the nut 29 on the nipple 5 `engaging the last core member sleeve 4,\thus serving to assemble the structure as a rigid unit. n

The protruding threaded nipple 5 may be connected to the exhaust of an engine, or wherever it is desired to be used, and the incoming gases passing therethrough enter the first enlargement. 6 to have their pressure materially reduced as they are dispersed therefrom through the openings 30 to enter the inner housing receptacle. The pressure is relieved by sufficient movement of an 1nner housing section7 and the passage of the gases out of the distributed endless opening along the flange 8. With this shell element 7 of brass or copper, or other good heat conductor, a considerable amount of heat is abstracted from the exhaust gases,-in addition to that lost by the expansion in the enlargement 6 and receptacle of the inner housing The extent of. the opening at flange fluttering movement, and the variation of the opening size to automatically relieve the internal pressure, brings about a self cleaning, so there is no l'clogging accumulation in operation to bring up back pressure. Furthermore, the quick closing and great reduction of temperature by abstraction of heatfrom the gases and quiet expansion, effects such a minimizing of back pressure as to make possible a running at less than atmospheric back pressure. Similar relief` occurs in the several independently operating enlargements and receptacles so that the exhaust from a gas engine is so cooled as to merely having a warming action upon ones hand, and the device operating as an eflective silencer. The outer housing makes the mechanism more sightly and assists in muflling any noises. The inner housing member -7 at the left in Fig. 2 is shown as slight-1y unseated or open.

What is claimed and it is desired to secure by Letters Patent is:

l. A muiller comprising a receptacle provided with a gas receiving opening, a normally closed discharge opening surrounding said receptacle, and a housing for the receptacle having openings in excess of the discharge vopening area.

.2. A muffler comprising a receptacle provided with a gas receiving opening, a yieldably closed endless discharge opening centrally of said receptacle, and a housing for the receptacle having a plurality of openings to allow escape of the discharged gas.

3. A mufHer comprising a pair of mem-` bers forming a chamber, one of which members is fixed and the other of which members is movable adj acent the fixed member to form a discharge opening therebetween, there being yieldable means to maintain said discharge opening normally closed, and said chamber being provided with an inlet -opening opposite the fixed member.

4:. A mufller embodying a pair of opposing vessel-shaped members forming a chamber therebetween, each of said members being provided with a flange, the flange of one member being yieldably seated to abut against the flange ofthe other to provide a normallyclosed ldischarge opening for the chamber.

5. A muffler including a pair of members forming a chamber provided with an inlet opening duct, one of said members normally seating against the other member in abutting relation and movable therefrom to provide a discharge opening therebetween, and connecting means between the members and duct for holding in assembled relation.

6. A muiller embodying a pressure distributing core having a plurality of enlar ements disposed in series, and a housing or each of said enlargements.

7. A mulller having a pressure distributing core forming an enlargement, and a housing with which said core is normally in communication, said housing provided with a normally closed discharge opening.

8. A muiler comprising a pressure distributing core having a. succession of enlargements in series, and a housing for each enlargement, said housings embodying opposing flanged sections relatively movable to provide discharge openings therebetween.

9. A mulller comprising a plurality of independently automatically movable sections.

l0. A mulller comprising a plurality of pressure distributing receptacles each provided with a normally closed discharge opening, and each receptacle havin a yieldable portion to permit opening 0% its discharge opening.

11. A muiiler comprising a plurality .of receptacles each provided with a section movable away from an adjacent section to form a discharge opening, andl yieldable means normally holdin saidmovable sections in position to maintain the discharge openings closed.

12. A muffler comprising a pair of relatively movable members forming a chamber having a discharge opening therefrom, a spring spaced from the members, and connections from the spring to the members normally to maintain the discharge opening closed.

13. A muffler comprising a receptacle provided with a gas intake opening and a normally closed outlet for said gas, and a housing for'y the receptacle having an escape openingfor thev discharged gas in yexcess of the discharge opening area.

14.-. A muffler comprising a pair of relatively movable members forming a chamber therefrom, and adjusting means for regulat- 1 having a discharge opening therefrom, a ing the action of said discharge openlng. spring spaced from sai chamber, a housing n testimony whereof I aiix my signature for said s ring, and connections from the in the presence of two witnesses.

5 sprin to t e members normally to 'maintain 4 the digscharge opening closed. NATHANIEL RAIT 15. A muler comprising a pair of rela- Witnesses: tively movable members forming a chamber Gm. E. Kum,

having a normally closed discharge opening C. H. RAUCH. 

